What are the LD4B manifold worth?

I sold s decent one at mopars at the rock for 140$...I think 300$ is too much unless it's a new in the box one or something and then I wouldn't even want to use it.
Lol! I bought an LD4B at Mopars at the Rock for $140! I thought it was a great deal. I also scored a mint LD340 with the ChryCo part number for $200 at the same show.

One Ya'lls got robbed!:poke::lol: